RU2364510C2 - Hydraulic press with unloading of base components - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention is attributed to equipment for material pressure-shaping. Hydraulic press comprises frame, moving transverse member, beam, upper and lower tools. The frame is made as top and bottom cross-members. Cross-members are interconnected by pillars. The press is fitted with additional hydraulic press. Additional press comprises upper transverse members, tie rods, cylinders with hydraulic fluid, pillars and lower transverse members. Additional press is mounted with possibility to transfer its force to moving transverse member via tie rods and upper transverse members. Furthermore additional press force transfer to lower tool is provided using pillars of additional press, lower transverse member and pins.

EFFECT: press dimensions reduction and durability improvement is provided.

8 dwg

Description

The invention relates to mechanical engineering and can be used in the design of new hydraulic presses, as well as for the modernization of existing equipment.

Known hydraulic presses made with lower cylinders and movable frames (A.F. Belov. B.V. Rozanov. V.P. Lints. Die forging on hydraulic presses. - M.: Mechanical Engineering, 1986, p. 43) . Cylinders rest on the lower base, their plungers press on the cross members of the movable frames. Presses with a movable bed have a lower height above the floor of the workshop.

Hydraulic presses are also known, where the scheme with a movable frame is used in combination with a conventional fixed bed (A.F. Belov. B.V. Rozanov. V.P. Lints. Die forging on hydraulic presses. - M.: Mechanical Engineering, 1986 ., p. 43). The press has two working cylinders, one of which is mounted in the upper cross member of the fixed bed, and the other rests on its lower cross member, its plunger presses on the lower cross member of the movable frame. This design scheme is usually called a "tandem". Presses built according to this scheme have smaller dimensions in plan.

A disadvantage of the known hydraulic presses is the need to have a large prepress space to accommodate the lower cross member of the movable frame. In addition, in the tandem scheme, the lower cross member of the fixed bed receives loads from the combined forces of the upper and lower cylinders.

The technical result of the invention is to eliminate these drawbacks by replacing the movable frame with an additional hydraulic press, which is built into the main one. In this case, the cylinders of the additional hydraulic press are located between the columns of the main hydraulic press. The force of the additional hydraulic press is transmitted to the movable traverse and closes directly on the lower tool. Due to this, it is possible to reduce the dimensions of the hydraulic press in height, unload the lower cross member of the bed and increase its technological force.

The proposed press is shown in figures 1, 2, 3, 4, 5, 6, 7, 8, where in figure 1 is a general view of the press, in figure 2 is a side view, in figure 3 is a section along aa . Figures 4, 5, 6, 7 show how an additional press can be integrated into an existing one.

The main press consists of an upper cross member 1, a lower cross member 2, columns 3, a movable cross beam 4, main cylinders 5, a beam 6, a lower tool 7 and an upper tool 8. The lower cross member 2 and the upper cross member 1 are connected by columns 3 and constitute the press frame . The additional press consists of an upper crosshead 9, rods 10, cylinders 11, columns 12, a lower crosshead 13, pins 14, a plunger 15. A return cylinder with a plunger 16 is made in the piston part of the plunger.

The operation of the hydraulic press is as follows.

After supplying the working fluid to the main cylinders 5, their plungers move the movable beam 4, which, in turn, transfers force through the beam 6 to the upper tool 8.

After the working fluid is supplied to the cylinders 11 of the additional hydraulic press, they move downward and, through the rods 10 and the upper crossheads 9, transmit the force to the movable crosshead 4, which, in turn, transfers the force through the beam 6 to the upper tool 8. From below through the columns 12, the crosshead 13 and pins 14, the force closes directly on the lower tool 7. The return of the movable crosshead 4 is carried out by the return cylinder.

Since the application of this scheme does not require large prepress space, it is possible to significantly reduce the size of the press. The full force of the hydraulic press is perceived only by the movable traverse, beam and lower tool. Unloading the frame parts also allows to reduce their dimensions and increase durability. The greatest economic effect from the use of such a scheme can be obtained by modernizing the existing hydraulic presses in order to increase the working effort. By incorporating additional hydraulic presses similar to those shown in FIG. 3, it is possible to increase the working force of existing equipment without overloading the base parts.

Claims (1)

A hydraulic press containing a bed in the form of an upper and lower cross member connected by columns, a movable cross beam, a beam, an upper and lower tool, characterized in that it is equipped with an additional hydraulic press that contains upper cross beams, rods, cylinders with working fluid, columns and the lower beam and is installed with the possibility of transmitting its force to the movable beam through rods and upper beam and the lower tool through columns of an additional hydraulic press, lower beam and pcs ray.

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